<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script src="../js/jquery-3.4.1.min.js"></script>
		<script>
			$(function(){
				alert("welcome to jquery");
				jQuery("div").text("你号，这是div");
				$("div").css("font-size","100px");
				$("div:last-of-type").css({"color":"red","border":"4px groove green","border-radius":"10px","text-align":"center"});
			});
		</script>
	</head>
	<body>
		<div></div>
		<div></div>
		<div></div>
		<div></div>
		<div></div>
		<div></div>
		<div></div>
		<div></div>
		<div></div>
	</body>
</html>
